Page 542 - SET 1 Koleksi Soalan dan Skema Jawapan SPM KBSM

variables

1
Able to state any one variable correctly or Able to state idea of all variables

Able to state the relationship with direction between the manipulated variable and the responding variable

Sample answer
1. Copper (II) sulphate solution produces brown deposit at the iron spoon but 3
Zinc sulphate solution does not produce brown deposit at the iron spoon

2(c) Able to state the relationship between the manipulated variable and the responding variable
Sample answer: 2

1. Copper (II) sulphate solution produces brown deposit on iron spoon

Able to give an idea of the hypothesis

Sample answer: 1
1. Copper (II) sulphate solution coats iron spoon
.

Able to list the materials and apparatus completely

Sample answer:

Materials

1. Iron spoon 2. Copper (II) sulphate solution 3. Copper rod 4. Zinc sulphate solution

Apparatus

5. Beaker 6. Connecting wires 7. Batteries 8. Switch 9. Sandpaper

Able to list the materials and apparatus less completely
Sample answer

Materials
2(d) 1. Iron spoon 2. Copper (II) sulphate solution 3. Copper rod 2

Apparatus

4. [Container] 5. Connecting wires 6. Batteries

Able to give an idea of the list of materials and apparatus

Sample answer:

Materials:
1
1. Iron spoon 2. [electrolyte]

Apparatus

3. [Suitable container] 4. Batteries

Able to state correctly all the steps in the procedure
Sample answer:

1. Rub the iron spoon and copper rod with sandpaper
2. Pour copper (II) sulphate solution into a beaker until two-thirds full 3
3. Insert the iron spoon and copper rod into the solution.
2(e) 4. Complete the circuit
5. Observe the iron spoon and record it in a table
6. Repeat the experiment by replacing copper (II) sulphate solution with zinc sulphate solution

2
Able to state less correctly the steps 2, 3, 5 and 6

Able to state an idea of steps 2 and 3 1